Alloy



UNITED STATES DANIEL OHARA, DA I L w.

PATENT OFFICE.

:ELDREDGE, AND JOHN LOGAN, 0F. -WALTHAM,- .llIASSACHUSETTS.

.ALLoY.

sPncrr'icATIoN forming ar; of Letters Patent No. 385,948, dated army 10, 1888.

1'0 cnMwZwm it 11241 11 9 16?? I Be it known thatwe, DANIEL QHARA, DAN TEL W, ELDREDGE, and JOHN LOGAN, of Wallham, in the county of Middlesex and State of 5 ll'lassachus'ct'ts, have invented certain new and useful Improvements in Alloys, of which the following is a speeificationo Onrinvention hasfo'r'i'ts object to provide a 1 alloy or compound metal which shall be practi- Io eallynon-nmgnetic, inoxidiznble, and will have a suitable eoefficient of expansion to adapt it. for use as amnterial for one of the parts of the rim of a compensation-balance for watches or ehrono'meters, f T

Our improved alloy consists of a compound of platinum, nickel, and copper in about the following prop,0rli0ns,viz,: platinum,fifty (50) to sijity (60) parts 'nickel,

copper, twenty (20) parts.

2c L'XY-edonot-lhzit ourselves to'the enact plfOi twenty parts.

In testimony whereof we have signed our thirty,(30) parts; v

Serial N0; 2 65,n28. '(N'o speeimens) An alloy or compound metal composed'of A platinum, nickel, and copper, in about the proportions specified, namely: plati'nnni,-fifty to parts-and copper,

" i v3o sixty parts; nickel, thirty names to this specification, in the presence of two subscribing x'vitnessesthis 28th day of February, A. D. l I

' v DANIEL GHARA'.

DANIEL W. ELDRED GE.

JOHN LOGAN.

Witnesses: p

HENRY N. FISHER,

' EDWARD A. MARSH.

portions of nickel andcopper albove specified,

but may vary" the sam'e Vii/illDYEGSUnublChmltfl'1 

